AD David Brandon resigns…U-M extends M-Cubed program…U-M economist Wolfers: one of 10 “tweeple” you should follow…U-M prof Prabal Dutta named one of “Brilliant 10″…Artifact from 1800s found while moving massive oak on campus…U-M’s Howard Markel on the history of quarantine…Detroit’s exit from bankruptcy…Fracking’s unexpected benefits.